TextView在请求协助时抛出NullPointerException。有什么想法是错的吗？我什至不知道崩溃时屏幕上到底显示了什么。FatalException:java.lang.NullPointerException:Attempttoinvokevirtualmethod'android.graphics.Rectandroid.graphics.drawable.Drawable.getBounds()'onanullobjectreferenceatandroid.text.style.DynamicDrawableSpan.getSize(DynamicDrawable